Examples: Clean up. (#27715)

examples/webxr_vr_handinput.html

@@ -86,7 +86,7 @@
 				container.appendChild( renderer.domElement );
 
 				const sessionInit = {
-					optionalFeatures: [ 'hand-tracking' ]
+					requiredFeatures: [ 'hand-tracking' ]
 				};
 
 				document.body.appendChild( VRButton.createButton( renderer, sessionInit ) );

examples/webxr_vr_handinput_cubes.html

@@ -99,7 +99,7 @@
 				container.appendChild( renderer.domElement );
 
 				const sessionInit = {
-					optionalFeatures: [ 'hand-tracking' ]
+					requiredFeatures: [ 'hand-tracking' ]
 				};
 
 				document.body.appendChild( VRButton.createButton( renderer, sessionInit ) );

examples/webxr_vr_handinput_pointerclick.html

@@ -321,7 +321,7 @@
 			container.appendChild( renderer.domElement );
 
 			const sessionInit = {
-				optionalFeatures: [ 'hand-tracking' ]
+				requiredFeatures: [ 'hand-tracking' ]
 			};
 
 			document.body.appendChild( VRButton.createButton( renderer, sessionInit ) );

examples/webxr_vr_handinput_pointerdrag.html

@@ -424,7 +424,7 @@
 			container.appendChild( renderer.domElement );
 
 			const sessionInit = {
-				optionalFeatures: [ 'hand-tracking' ]
+				requiredFeatures: [ 'hand-tracking' ]
 			};
 
 			document.body.appendChild( VRButton.createButton( renderer, sessionInit ) );

examples/webxr_vr_handinput_pressbutton.html

@@ -381,7 +381,7 @@
 			container.appendChild( renderer.domElement );
 
 			const sessionInit = {
-				optionalFeatures: [ 'hand-tracking' ]
+				requiredFeatures: [ 'hand-tracking' ]
 			};
 
 			document.body.appendChild( VRButton.createButton( renderer, sessionInit ) );

examples/webxr_vr_handinput_profiles.html

@@ -93,7 +93,7 @@
 				container.appendChild( renderer.domElement );
 
 				const sessionInit = {
-					optionalFeatures: [ 'hand-tracking' ]
+					requiredFeatures: [ 'hand-tracking' ]
 				};
 
 				document.body.appendChild( VRButton.createButton( renderer, sessionInit ) );